【多选题】生产观念产生和流行的客观经济条件是( )
【多选题】生产 观念产生和流行的客观经济条件是 。
【单选题】The need for solar electricity is clear. It is safe, ecologically sound, efficient, continuously available, and is has no moving parts. The basic problem with the use of solar photovoltaic devices is ...
A.
discussing the importance of solar energy
B.
explaining the functioning of solar cells
C.
presenting a history of research on energy sources
D.
describing a possible solution to the problem of the cost of photovoltaic cells
【单选题】实施幼儿德育,教师应热爱和尊重幼儿,下列做法不正确的是( )
A.
教师对幼儿的热爱不仅基于感情,也基于种社会责任
【多选题】生产观念产生和流行的客观经济条件是 ( )
【单选题】产品观念产生和流行的客观经济条件是( )。
【简答题】1 New technology often creates unanticipated problems. 2 A utomobiles, for example, provide numerous benefits, but they also pollute the air and kill about fifty thousand Americans each year. 3 It is ...
【单选题】Most of us take electricity for ____ . But do you know that about 1.5 billion people in this world have no access to electrical power?